I don't think they are trying to answer your big question. On one hand, as mentioned in previous replies, even a human cannot just understand what you are talki

I don't think they are trying to answer your big question. On one hand, as mentioned in previous replies, even a human cannot just understand what you are talking about and would ask further questions, on the other hand, it is not about to try to answer all questions but to find some interesting, frequent cases that products like Viv can solve for you. Maybe we should mostly think about AI products/tools as just another (weird) friend who is good at answering certain questions for us. At the end, we don't even expect any of our friends to be able to answer all of our questions. Indeed, we pick the right friend for right question.